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Old 09-12-2017, 04:46 PM   #1
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Sound Deadening

Has anyone out there attempted to lessen the sounds emanating from the dog house (and other up-front areas) of their Jayco Alante/Precept? I am assuming, without first-hand knowledge that the general layout of the Alante and Precept are reasonably similar as it relates to the dog house.

Before I spend money/time installing insulation, and since I have almost zero experience with motor homes, I would very much appreciate any input from more experienced owners who have battled with the noise level.

Thanks in advance for any responses.
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Old 09-12-2017, 04:58 PM   #2
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Thumbs down Cold air intake

I installed a Banks cold air intake on our 2014 Tiffin Open Road and it is so loud that I will soon be removing it. I also added almost an inch of extra insulation to the "dog house" which proved to be a waste of time and money.
Would never recommend a cold air intake on the Ford V10. Much too loud. Cannot carry on a conversation in the cockpit.
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Old 09-12-2017, 09:09 PM   #3
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Originally Posted by Harjac View Post
I installed a Banks cold air intake on our 2014 Tiffin Open Road and it is so loud that I will soon be removing it. I also added almost an inch of extra insulation to the "dog house" which proved to be a waste of time and money.
Would never recommend a cold air intake on the Ford V10. Much too loud. Cannot carry on a conversation in the cockpit.
Harjac,

Thank you for the input. Since I have only driven the coach less than 2,000 miles, at this moment I have no issues with the engine power. However, I am tired of listening to the loud cockpit noises. I am entirely new to the motor home world so maybe noise is an issue that one has to live with, but I am hoping that someone has had success with a sound deadening process. Have a great day!
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Old 09-12-2017, 09:16 PM   #4
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If you want quiet, and a great ride, get a diesel pusher.

FWIW: I routinely drive Allegro Open Road, assorted Fleetwood, and assorted Thor Class A's. The Allegro is the most quiet of the bunch.
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Old 09-12-2017, 09:56 PM   #5
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Thermo tech cool it. Amazon. Keeps DW cooler and the cab is much quieter. One layer under house, floor mat, and seats. As much as I can reach on the outside, reaching under from house, and from ground. (E450) I used 2 30x60" rolls. IIRC, the hot spot in the pass floor was 30 deg cooler, going through 115 deg heat desert area. Before, had measured about 160 deg, at the point where the exhaust goes past the house/floorboard seam.
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Old 09-12-2017, 10:02 PM   #6
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One warning... less engine and road noise means DW can hear other things, causing more fixes to be on my list
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Old 09-13-2017, 03:02 PM   #7
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Sound Deadening

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Originally Posted by Do26 View Post
Thermo tech cool it. Amazon. Keeps DW cooler and the cab is much quieter. One layer under house, floor mat, and seats. As much as I can reach on the outside, reaching under from house, and from ground. (E450) I used 2 30x60" rolls. IIRC, the hot spot in the pass floor was 30 deg cooler, going through 115 deg heat desert area. Before, had measured about 160 deg, at the point where the exhaust goes past the house/floorboard seam.
Thank you for the response. I have looked at several products on YouTube and Amazon, and am wondering if a combination of a mat-type material and a spray-on/roll-on (applied either over or under mat) would be helpful. The other issue is, "would this two-layer approach be wasteful in the sense of return on effort?"

When you did your coach, did you also put material inside the wheel wells? This is a brand new coach, and your comment about where you applied the material has me a little confused/concerned. Did you remove the carpet inside the coach (including the dog house) of did you only put the material underneath the coach in the approximate position of those interior areas (did this make sense)?

Finally, the ONLY benefit of having a hearing deficiency is that I can always claim to not hear my spouse when appropriate.
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Old 09-13-2017, 03:32 PM   #8
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I took out the seats and the floor mat for easier installation. I covered the complete floor under the seats as well as as far up as possible in the firewall and Fender area. My suggestion is anywhere you can reach in the cab, firewall, and Fender area. That will take care of heat and noise in the cab area. Next would be to follow along the exhaust system underneath and insulate as much as you can reach in that area as well. It will never be completely quiet, but products such as I suggested do make a noticeable difference with both heat and Noise.
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Old 09-13-2017, 03:34 PM   #9
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My advantage was having my wife using an infrared temperature gun. She made sure to point out the hottest spots where she puts her feet and where the heat radiated onto her legs.
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Old 09-13-2017, 06:48 PM   #10
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Sound deadening

V3600 has the answer, and we are looking for a diesel pusher. I don't think anything can be done to quieten an up front v10 engine. Don't have a problem with heat, just noise. Love our Open Road floor plan and workmanship but manufacturer should do more to insulate and sound proof any unit with engine up front. Torture to drive in a hilly or mountainous area.
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Old 10-31-2017, 04:10 PM   #11
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I removed the doghouse on my Alante (hard as they hide the screws under the carpet) and used fatmat on the underside, as well as the top box Jayco covers the fuel rail with. Did under the dash in the engine compartment and also under the carpet in the footwells. This has made a HUGE difference in the noise, we can carry on a normal conversation now. Don't want or need a DP, can't justify the $$$ as we do not full time. I have also loaded a 5 star tune which has greatly reduced the engine 'roar' from downshifting whenever it sees a hill, stays in the peek torque 3200 rpm range much longer.
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Old 10-31-2017, 11:59 PM   #12
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Sound Deadening

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Originally Posted by JesseS View Post
I removed the doghouse on my Alante (hard as they hide the screws under the carpet) and used fatmat on the underside, as well as the top box Jayco covers the fuel rail with. Did under the dash in the engine compartment and also under the carpet in the footwells. This has made a HUGE difference in the noise, we can carry on a normal conversation now. Don't want or need a DP, can't justify the $$$ as we do not full time. I have also loaded a 5 star tune which has greatly reduced the engine 'roar' from downshifting whenever it sees a hill, stays in the peek torque 3200 rpm range much longer.
JesseS,

Thanks so much for your response. Please forgive the long response, but your input appears the closest to my actual situation.

I have read (and watched) many of the YouTube videos on doing essentially what you have described, but I have two concerns: 1) this is a brand new (2016 with less than 2,000 miles) on it and 2) my lack of expertise in doing mechanical things, e.g., removing/replacing the carpet and dog house in such a manner that the finished product does not look like it was done by a kindergartner! Were you able to find a YouTube video of doing this work on a new/late-model Alante? I have not found such in my searches.

Did you:
  1. also apply the FatMat "under the floor pan and wheel wells" as well as under the carpet
  2. remove the dash to apply material there
  3. have to remove the housing for the Jensen radio/electronics to remove the dog house
  4. find a need to replace any gaskets/sound-proofing strips when replacing the dog house
  5. FINALLY, on the issue of the 5 Star Tune - I have read several articles on this product, but, again, my lack of mechanical expertise keeps me from properly analyzing the need. I also read somewhere that installing this could void the warranty.
I sincerely hope that you will consider investing a bit more of your time in responding to these queries. Thank you in advance for your response. Have a great day!
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Old 11-01-2017, 10:25 AM   #13
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Quote:
Originally Posted by plapen View Post
JesseS,

Thanks so much for your response. Please forgive the long response, but your input appears the closest to my actual situation.

I have read (and watched) many of the YouTube videos on doing essentially what you have described, but I have two concerns: 1) this is a brand new (2016 with less than 2,000 miles) on it and 2) my lack of expertise in doing mechanical things, e.g., removing/replacing the carpet and dog house in such a manner that the finished product does not look like it was done by a kindergartner! Were you able to find a YouTube video of doing this work on a new/late-model Alante? I have not found such in my searches.

Did you:
  1. also apply the FatMat "under the floor pan and wheel wells" as well as under the carpet
  2. remove the dash to apply material there
  3. have to remove the housing for the Jensen radio/electronics to remove the dog house
  4. find a need to replace any gaskets/sound-proofing strips when replacing the dog house
  5. FINALLY, on the issue of the 5 Star Tune - I have read several articles on this product, but, again, my lack of mechanical expertise keeps me from properly analyzing the need. I also read somewhere that installing this could void the warranty.
I sincerely hope that you will consider investing a bit more of your time in responding to these queries. Thank you in advance for your response. Have a great day!
Here is a link to a video which may help.

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Old 11-02-2017, 10:49 AM   #14
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Quote:
Originally Posted by plapen View Post
JesseS,

Thanks so much for your response. Please forgive the long response, but your input appears the closest to my actual situation.

I have read (and watched) many of the YouTube videos on doing essentially what you have described, but I have two concerns: 1) this is a brand new (2016 with less than 2,000 miles) on it and 2) my lack of expertise in doing mechanical things, e.g., removing/replacing the carpet and dog house in such a manner that the finished product does not look like it was done by a kindergartner! Were you able to find a YouTube video of doing this work on a new/late-model Alante? I have not found such in my searches.

Did you:
  1. also apply the FatMat "under the floor pan and wheel wells" as well as under the carpet
  2. remove the dash to apply material there
  3. have to remove the housing for the Jensen radio/electronics to remove the dog house
  4. find a need to replace any gaskets/sound-proofing strips when replacing the dog house
  5. FINALLY, on the issue of the 5 Star Tune - I have read several articles on this product, but, again, my lack of mechanical expertise keeps me from properly analyzing the need. I also read somewhere that installing this could void the warranty.
I sincerely hope that you will consider investing a bit more of your time in responding to these queries. Thank you in advance for your response. Have a great day!
1. No, if you do the doghouse, the box in front of it, the footwells, and under the dash from outside it quieted ours down enough.
2. No, did under the dash from outside, lot of cutting to trim around stuff but its doable.
3. Yes I did, the four screws on the front, pull out the Jensen, one screw on the front lower inside the housing that goes thru the dash lip into the top of the doghouse, and another screw in the drivers footwell that can be reached from behind the left side of the dash skirt.
4. No, if you cut the deadner to about 1" from the lip of the doghouse then when installed the lip overlap fits snug
5. Anyone can install the 5 Star Tune as it just plugs in to the diagnostics port under the dash, it backs up and saves your stock tune before loading the custom one, this is in case you need to re-install the OEM tune prior to taking the coach in for any engine work or for smog check.

Rmoving the carpet to access the doghouse screws is just a matter of using a small 90 pry bar to lift the edge about 1" all around the base to find the screws, there will be 5 or 6, in my case there were 5, two on the right/left and one in front. Once you get it off I suggest cutting the carpet about 1.5" on each side of the screw hole creating a 'flap' that you can lift to re-install the doghouse, also makes it much easier to take off the next time, these when pressed down do not show. Re-glue the carpet edge to the doghouse prior to adding the fatmat, omitting glue on the screw flaps. All told this is a fairly easy fix, when putting the doghouse back on set it in place and slide it back under the dash while holding and stereo cables up out of the way, also the dash skirt on the passengers side was a tight fit. Hope this helps, any more questions just ask.
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